* {
    padding: 0;
    margin: 0;
}

li {
    list-style: none;
}

.banner {
    width: 1519px;
    height: 550px;
    margin: 0 auto;
    background-color: #fff;
    overflow: hidden;
    position: relative;
}



.banner ul li {
    width: 1519px;
    height: 550px;
    text-align: center;
    line-height: 200px;
    font-size: 50px;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: .5s;

}


.banner ol {
    width: 100%;
    position: absolute;
    display: flex;
    justify-content: center;
    bottom: 0;
}

.banner ol li {
    line-height: 20px;
    text-align: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    cursor: pointer;
    /* background: rgba(0, 255, 255, .3); */
    background: rgba(255, 255, 255, .6);
    margin: 10px;
}

.banner span {
    color: #fff;
    font-size: 26px;
    width: 60px;
    height: 60px;
    background: rgba(0, 0, 0,.2);
    border-radius: 50%;
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    top: 0;
    bottom: 0;
    margin: auto;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
.banner span:hover{
    background: rgba(0, 0, 0,.4);
}

#next {
    right: 10%;
}

#prev {
    left: 25%;
}

.show {
    opacity: 1 !important;
}

.active {
    /* background: rgba(255, 255, 0, .6) !important; */
    background: rgba(229, 229, 229, .8) !important;
}

.banner img {
    width: 1519px;
    height: 550px;
}